Oh, so sorry I misunderstood!!
Could you try to schedule their conferring time during perhaps your first round? They obviously need your attention the most. Maybe two days a week on writing, two days on reading?
For writing, perhaps you could have an discussion about whatever you'll be talking about, say in SS or Sci? Part of the problem is probably that they don't know where to start. You could give them a word bank of related words that you go over together, and talk about how they might use them to write their ideas. It's not exactly the "free choice" writing--but you can work toward that.
For reading, I'd suggest that you use a tool such as DRA or Reading A-Z assessments to find their actual reading levels if you haven't already. Then comes the hard part--finding books at their reading level that don't look too "young" for them. If you are interested, I'm sure lots of woks can suggest ideas for books to look at for them.
Maybe this makes more sense for your situation :). Again sorry I misunderstood your first post.